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1/4" x 3-3/4" Hex Head CONFAST® Concrete Screw, 100/Box

$23.75 per Box of 100
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   Availability: In Stock / Ships Today

SKU: CSH14334


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Products Features
  • COMPLETE ​LINE: Ensures ​correct ​product ​can ​be ​located ​and ​purchased ​for ​any ​job
  • ALL ​LENGTHS ​ARE ​AVAILABLE: Using ​the ​correct ​length ​screw ​ensures ​quality, ​secure ​fastening
  • SPECIAL ​THREADS: Decreases ​installation ​torque ​allowing ​screw ​to ​be ​installed ​faster and ​easier
  • TWO​ ​DIAMETERS: ​3/16" ​and ​1/4" Choice ​allows ​for ​wider ​variety ​of ​fastening ​applications depending ​on ​the ​hole ​in ​the ​fixture ​being ​attached
  • BIT ​INCLUDED ​IN ​EACH​ ​BOX: Using the correct ​bit ​will give you ​better-​holding ​values
Products specifications
Bit Size 3/16"
Minimum Embedment 1"
Thread Length 1-3/4"
Thread Type High-Low
2000 PSI Concrete - Pull-Out (lbs.) * 562
2000 PSI Concrete - Shear (lbs.) * 675
Type Male
Diameter 1/4"
Length 3-3/4"
Material Carbon Steel - Blue Coated
Environment Dry
Box Qty 100
Minimum Spacing 4"
Minimum Edge Distance 3"
Maximum Fixture Thickness 2-1/4" to 2-3/4"
Minimum Fixture Hole Diameter (In Place) 5/16"
Minimum Fixture Hole Diameter (Hole Spotted) 5/16"
Head Type Hex Washer
Length Measurement Underneath head
Driver Size 5/16"
Brand Name CONFAST®
Application Video

Installation Video
Installing a 1/4" x 3-3/4" Hex Head CONFAST® Concrete Screw
  1. Drill a 3/16" hole into the concrete using a carbide-tipped bit that meets ANSI Standards B212.15.
  2. Drill the hole a 1/2" deeper than the anchor will penetrate the concrete, making sure the minimum embedment requirements of 1" is met.
  3. The hole can be drilled while the fixture is in place. The minimum hole in the fixture for the 1/4" x 3-3/4" Hex Head CONFAST® Concrete Screw is 5/16".
  4. Clean the hole with a wire brush, vacuum, compressed air, or a blow-out bulb.
  5. Insert the point of the 1/4" x 3-3/4" Hex Head CONFAST® Concrete Screw into the hole. Make sure that the screw being installed will penetrate the base material a minimum of 1" but no deeper than 1-3/4".
  6. Using a 5/16" nut driver hex driver for the anchor , turn the screw clockwise, applying slight pressure until the head of the screw is snug against the material being fastened.
  7. Always use proper personal protective equipment per manufacturer's and OSHA instructions.

Product Reviews

* The figures above indicate average ultimate tension and shear failure values. A safety factor of 4:1 or 25% of ultimate value is generally accepted as a safe working load. Reference should always be made to applicable codes.

* The bits are recommended by diameter and may not necessarily be the length needed for your application. Please make sure the usable length will work for your application. *

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